Lock-nut.



T. J. PARKS.

LOCK NUT. APPLICATION FILED T313115, 1911.

9945688., Patented June 6, 1911.

PATENT current.

I 'rnoMAs zm'ranxs, "or Quantit KENTUCKY.

I LOCK-NUT.

oaaess.

yspecificat ion of Letters rat Applicationiiled Februa y 5 Patented Junefi -ii "Seria1No.6b8,672.

To all whom it may concern: I

Be it"known that I, THOMAS J. PARKS, a citizen of the United, States,residing at Charley, in the county of Lawrence and State ofKentucky,have invented new and useful Improvements in Lock-Nuts, of which thefollowing-is a specification.

This invention relates to improvements in lock nuts and the object ofthe invention is to simplifyand' improve the existing art by providing adevice of this character which 1s extremely simple of construction,cheap to manufacture and which will perform the function for which it isdevised with accurac'y'and surety. p

With the above and other objects in view -Wh1ch will .appear asthedescription' pro-' .gresses, the invention resides in the novel--construction and arrangement of parts hereinafterfully described andclaimed.

In the drawing accompanying this specifi'cation there has beenillustrated a simple andpreferred .embodimentof the improvement and inwhich drawing,

Figure 1 is a front elevation of a lock nut constructed in accordancewith the present invention, the bolt being shown --in position thereon,said bolt .being'shown in section.

Fig. 2 is a sectional View upon the'line 22 of Fig. 1. Fig. 3 is adetail horizontal sectiQnal view upon'the line 3-3 of Fig. 2. Fig. 4 isa detail perspective view of the locking dog. Fig. 5 is a similar viewof one of theretaining springs.

In the accompanying drawings, the numeral 1 designates a nut. This -nutmay be either square, hexagonal or of any other desired shape and is, ofcourse, provided with the usual threaded bore which is adapted for thereception of the bolt 2. In the drawings the nut has been illustrated assquare and the said nut has one of its; faces adjacent one of itscorners provided with a recess 3. The recess is adapted to communi catewith the bore of the nut and the said recess has its rear wall rounded.

The numerals 4 and 5 designate depressed vor cut away portions, the samebeing of a substantially semicircular formation and the walls providedby the said cut away portions are formed with grooves or pockets 6. Thenumeral. 7 designates the bolt lockin dog. The dog 7 has its rear facerounde' and is adapted to snugly fit within the rounded wall, providedby. the recess 3. Thedog is substantially V-shaped and has to contactwith the opposite sides of-the' locking dog within the recess 3.- Thesesprings are each constructed of a single piece of resilient material andhave their central its sharpened edge preferably provided with portionsbulged or otherwise provided with continuous enlargements designated bythe numerals 11. These enlargements adapted to be received within thegrooves or pockets 6 provided by the walls formed by the cut awayportions 4 and 5. The side faces of the locking dog 7 are provided withdepressions l2 and the projecting enlarge,

ments of the springs opposite those en aged 'within the pockets arepositioned within the said depressions 12.

By reference to the several figures of the drawing,'it will be notedthat each of the spring members comprises a substantially slitted ringand from the above description taken in connection with the accompanyingdrawings, it will be noted that the said spring members not only serveto exert opposite pressure upon the locking dog to-retain the same inengagement with a bolt, but

also provide means whereby the accidental removal of the dog, as well asthe accidental removal of the springs is effectively prevented.

Having thus fullydescribed the invention, what I.claim as new, is z yThe combination with a nut having a recssadjacent one of the cornersthereof, said recess communicating with the boreof the nut, the said nutbeing provided with semicylindrical cut away portions communlcating withthe recess, the inner wall formed by. .the recess being rounded, asubstantially V- shaped locking dog havmga rounded end adapted to bepositioned within the recess and to contact with the rounded wall formedthereby, the said Idog being of a length suificient to overlie therecess w n in s straightened or engaging position, at

are

said dog adapted to engage with the outer bulging, adapted to engage thepockets prowalls formed by the recess when in its disvided by thegrooves andthe depressions of 10 engaged position, the sides'of the dogbeing the locking d0g. I provided with depressions the Walls provided bythe rounded out aivay portions be- THOMAS PARKS ing each provided Withgrooves, and a pair Attest:

of spring members, each comprising a split W. M. C ArMAN,

ring, having their central portions offset or D. B. MEAD.

